<!DOCTYPE html> 
<html lang="en">

    <head>
        <meta charset="UTF-8">
        <title>404 Error</title>
    </head>

    <body>
        <h1 align="center">你想要的界面消失了哟</h1>
        <!-- 如果想要显示，必须要放到static文件夹下面去，这是flask的规定 -->
        <img align="center" src="../static/404.png" alt="" height="873px" width="626px">
    </body>

</html>